Fuel indicator knob



FIG. 1 is a perspective view of the fuel indicator knob inset into a fuel container, the hidden line showing of the container is for illstrative purposes only and forms no part of the claimed design;

FIG. 2 is a top view of the thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a back view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a left view thereof. 

The ornamental design for a fuel indicator knob, as shown. 